Finding the Fourth Proportional to 16,148.22, 22,285.26 and 8,978.28

Step by Step Solution

1. Step 1: Write the proportion equation
   16,148.22 : 22,285.26 = 8,978.28 : x
2. Step 2: Convert to fraction form
   16,148.22/22,285.26 = 8,978.28/x
3. Step 3: Cross multiply
   16,148.22x = 22,285.26 × 8,978.28
4. Step 4: Simplify right side
   16,148.22x = 200,083,304.15
5. Step 5: Solve for x
   x = 200,083,304.15/16,148.22
6. Step 6: Final answer
   x = 12,390.42